Regular Expressions 101

Explanation

Pro

<the literal < (60₁₀ / 74₈ / 3C₁₆)

Group name1(?P<name1>\w*)

\w*a Unicode word character, repeated any number of times

><the literal text ><

Group name2(?P<name2>h[1-5])

hthe literal h (104₁₀ / 150₈ / 68₁₆) (case sensitive)

Character Class[1-5]

1-5one character from 1 (49₁₀) to 5 (53₁₀)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

.*any Unicode character (except for line terminators), repeated any number of times

</the literal text </

(?P=name2)the text saved by group name2

></the literal text ></

(?P=name1)the text saved by group name1

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

25 tokens

<(?P<name1>\w*)><(?P<name2>h[1-5])>.*</(?P=name2)></(?P=name1)>

<html><h1>www.baidu.com</h1></html>

<html><h1>www.baidu.com</h1></html>